Rankers Physics
Topic: Thermal Physics

A gas of volume changes $2\text{ litre}$ to $10\text{ litre}$ at constant temperature $300\text{ K}$, then the change in internal energy will be: (1998)
$12\text{ J}$
$24\text{ J}$
$36\text{ J}$
$0\text{ J}$

Solution:

Since the process takes place at a constant temperature (isothermal), the internal energy of an ideal gas depends only on temperature, so the change in internal energy is zero.

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